System Configuration

Mouse

The touchpad and TrackPoint work out of the box, but the physical buttons for the trackpoint do not. You will need to install xf86-input-synaptics.

Note: The most recent Linux kernels (at least 4.0.5) support TrackPoint buttons out of the box. The following information pertains only to older versions of the kernel.

If you would rather not install a recent kernel, there is a work around for Linux 3.19.2-ARCH. If you add options psmouse proto=imps to /etc/modprobe.d/x250.conf, you can force the mouse module to use a more basic protocol than the built in one for the TrackPoint, which needs a patch. The effect is that the touchpad and mouse are treated as one device, but synaptics is not supported. If you want two finger scrolling, for example, you will need to either deal with the broken TrackPoint buttons are install the new module.

Fingerprint

Backlight and Keyboard

In order to get the backlight to work, I added options thinkpad_acpi force-load=1 to /etc/modprobe.d/x250.conf. This forces the thinkpad_acpi module to load, which is needed for controlling the backlight via xorg-xbacklight as well as enable some of the extra media keys.

Note: Not all X250 keyboards have backlight

Although a dedicated Pause-key is missing, it can be input using the key combination Fn + P

Sound and Volume Control

With acpid and alsa-utils installed, you can map the volume buttons to change the volume. Here are some samples: